GMS81C2012/GMS81C2020
HYUNDAI MicroElectronics
Function
PIN NAME
In/Out
Basic
Alternate
VDD
VSS
-
-
Supply voltage
Circuit ground
RA (Vdisp
)
I(I)
1-bit high-voltage Input only port
Reset signal input
High-voltage input power supply pin
RESET
XIN
I
I
Oscillation input
XOUT
O
Oscillation output
SXIN(R74)
SXOUT(R75)
R00 (INT0)
R01 (INT1)
R02 (EC0)
R03 (BUZO)
R04~R07
I
Sub Oscillation input
Sub Oscillation output
General I/O ports
O
I/O (I)
I/O (I)
I/O (I)
I/O (O)
I/O
External interrupt 0 input
External interrupt 1 input
Timer/Counter 0 external input
Buzzer driving output
8-bit high-voltage I/O ports
R10~R17
I/O
8-bit high-voltage I/O ports
8-bit high-voltage I/O ports
6-bit high-voltage I/O ports
R20~R27
I/O
R30~R35
I/O
R40 (T0O)
R41~R43
I/O (O)
I/O
Timer/Counter 0 output
4-bit general I/O ports
R50~R52
I/O
R53 (SCLK)
R54 (SIN)
R55 (SOUT)
I/O (I/O)
I/O (I)
I/O (O)
Serial clock source
Serial data input
Serial data output
8-bit general I/O ports
PWM 1 pulse output /Timer/Counter 1 out-
put
R56 (PWM1O/T1O)
I/O (O)
R57
I/O
R60~R67 (AN0~AN7)
I/O (I)
8-bit general I/O ports
4-bit general I/O ports
Analog voltage input
R70~R73
(AN8~AN11)
I/O (I)
AVDD
AVSS
VDD
-
-
-
-
Supply voltage input pin for ADC
Ground level input pin for ADC
Supply voltage
VSS
Circuit ground
Table 5-1 GMS81C2020 Port Function Description
14
MAR. 2000 Ver 1.00
HYNIX [ HYNIX SEMICONDUCTOR ]
